JP2007184206A - Electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide electronic equipment which enables miniaturization and reduces a ratio of a mount inhibition area on a board. <P>SOLUTION: This electronic equipment 100 comprises a frame 10, a circuit board 40 to be housed in the frame 10, and a connector 50 with multiple connector pins 51 aligned in a housing 52. To hold a printed circuit board 41; the connector 50 has a connector holder 53 which is extended along the surface of the printed circuit board 41 from the housing 52 until it contacts the printed circuit board 41, and is fixed on the printed circuit board 41 by the connector holding means 60. In addition, the frame 10 has the board holding means 21 and 31 for holding the printed circuit board 41 from the upper and lower sides, and these board holding means 21 and 31 hold the connector holder 53 and the region for connector holder placement on the printed circuit board 41. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic device in which a circuit board on which electronic components are mounted is housed in a housing.

  Conventionally, for example, Patent Document 1 is disclosed as an electronic device in which a circuit board on which electronic components are mounted is housed in a housing. In the electronic device disclosed in Patent Document 1, the circuit board is fixed to the casing with screws in a state of being sandwiched between a case and a cover constituting the casing. That is, the housing is arranged in the vertical direction of the circuit board in order to prevent the positional displacement (movement) of the circuit board in the housing. In such a configuration, the fixed part of the circuit board is an area where electronic components cannot be mounted (hereinafter referred to as a mounting prohibited area).

Patent Document 2 discloses a connector mounting structure for a circuit board. According to this mounting structure, the flange-shaped board mounting portion is formed on the side walls (both left and right) of the housing constituting the connector, and the screw is inserted into the screw hole formed in the approximate center of the board mounting portion. The connector is fixed to the circuit board. In such a configuration, a portion corresponding to the board mounting portion of the circuit board is a mounting prohibited area.
JP 2003-289191 A JP 2004-206924 A

  By the way, in the case of the electronic device having the configuration shown in Patent Documents 1 and 2, a circuit board requires a part fixed to the housing and a part corresponding to the board mounting portion of the connector. Therefore, there is a problem that the percentage of the mounting prohibited area in the circuit board is large, and the board area is increased if the circuit function is the same.

  It is also conceivable to reduce the mounting prohibited area on the circuit board by forming the board mounting portion in the lower part of the housing constituting the connector. However, if the board mounting portion is formed in the lower part of the housing, the height of the connector from the board surface is increased by the board mounting portion, so that it is difficult to downsize the electronic device in the height direction.

  In view of the above problems, an object of the present invention is to provide an electronic device that can be miniaturized and that can reduce the proportion of a mounting prohibited area on a substrate.

  In order to achieve the above object, the invention according to claim 1 is an electronic component mounted on a housing and a printed circuit board, a circuit board housed in the housing, and one end mounted on the circuit board, A connector having a plurality of connector pins as external connection terminals, the other end of which is exposed to the outside of the housing, and the connector extending along the surface of the printed circuit board from the housing. , Having a connector fixing part fixed to the printed circuit board by the connector fixing means in contact with the printed circuit board, and the housing has a substrate fixing means for fixing the printed circuit board from at least one of the upper side and the lower side, The printed circuit board is fixed in a state in which at least a part of the circuit board fixing means is in contact with at least one of the rear surface of the part where the connector fixing part and the connector fixing part of the printed circuit board are arranged. Is the fact characterized.

  As described above, according to the present invention, at least a part of the board fixing means provided in the housing includes the connector fixing part for fixing the connector to the printed circuit board and the back surface of the part where the connector fixing part of the printed circuit board is arranged. The printed circuit board is fixed in a state where it is in contact with at least one of the above. Accordingly, it is possible to reduce the ratio of the mounting prohibited area on the printed circuit board. That is, the board mounting density can be improved.

  In addition, since the ratio of the mounting prohibited area can be reduced, the size of the circuit board in the planar direction, that is, the size of the electronic device can be reduced. In addition, since the connector fixing portion extends from the housing along the surface of the printed board, the height of the connector, that is, the height of the electronic device can be reduced. Therefore, the size of the electronic device can be reduced in both the planar direction and the height direction.

  Specifically, as described in claim 2, the casing is configured by a box-shaped case that is open on one side and a cover that covers the case, and the substrate fixing means is provided in the case. The case-side fixing portion and the cover-side fixing portion provided on the cover are configured, and the case-side fixing portion and the cover-side fixing portion are preferably used to sandwich the back surface of the portion where the connector fixing portion and the connector fixing portion of the printed circuit board are arranged. .

  As described above, according to the present invention, the printed circuit board is sandwiched and fixed from above and below, so that the circuit board can be more stably fixed to the casing. In addition, since the connector fixing part is sandwiched between the printed board and the printed board, the printed board is reinforced by the connector fixing part, and the circuit board can be fixed to the rigid. That is, the distortion generated in the printed circuit board due to the bending when mating with the female connector, the load (housing, female connector, harness, etc.) applied to the connector fixing portion, the cooling load, etc. is reduced (the deformation of the printed circuit board is suppressed). Can do.

  As described in claim 3, one of the case-side fixing portion and the cover-side fixing portion has one tip portion that contacts the connector fixing portion or the printed circuit board, and the other contacts the connector fixing portion or the printed circuit board. It is preferable to have a configuration in which a plurality of tip portions are arranged, and one tip portion (one) is arranged at the center of gravity of the other tip portion (plurality) in the planar direction of the circuit board.

  In this case, distortion generated in the printed circuit board can be further reduced. In addition, in the structure of Claim 3, it is more effective if it is set as the structure by which the connector fixing means is arrange | positioned in the gravity center position as described in Claim 4.

  According to a fifth aspect of the present invention, in at least one of the case-side fixing portion and the cover-side fixing portion, a predetermined range from the contact tip with the connector fixing portion or the printed circuit board is preferably made of rubber.

  As described above, according to the present invention, the circuit board is fixed by the moderate flexibility of the rubber, and the printed circuit board is subjected to the bending when fitting with the female connector, the load applied to the connector fixing portion, the cooling load, and the like. The acting stress can be reduced.

  As described in claim 6, as a positioning means for determining a position when forming the casing, one of the case and the cover has a positioning projection and the other is a positioning hole into which the positioning projection is inserted. In the thickness direction of the printed board, the protrusion length of the positioning protrusion is preferably longer than the maximum height of the connector pin from the surface of the printed board.

  Thus, according to the present invention, the case and the cover can be assembled so that the board fixing means (one of the case side fixing part and the cover side fixing part) does not contact the connector pin. That is, it is possible to prevent a connection failure due to the contact of the board fixing means at the joint between the printed board and the connector pin.

  As described in claim 7, when the thickness of the connector fixing portion is equal to or greater than the rigidity of the printed board at the fixed portion, the printed board can be more effectively reinforced. That is, the printed circuit board can be more rigidly fixed.

  According to the eighth aspect of the present invention, it is preferable that the connector fixing portion has a larger area on the opposite surface of the contact surface (that is, the surface on which the substrate fixing means contacts) than on the contact surface with the printed circuit board. If comprised in this way, the contact area with a board | substrate fixing means can be ensured, reducing the mounting prohibition area | region which a connector fixing part occupies in a printed circuit board. Specifically, as described in claim 9, a configuration including a collar portion can be adopted as the facing surface.

  In addition, when the flange portion is provided on the connector pin arrangement side as described in claim 10, in addition to the above-described effects, the board conveyance guide can be widely used in the manufacturing process (for example, the reflow process). it can.

  As described in claim 11, it is preferable that the connector fixing portion includes a pair of first connector fixing portions arranged between the connector pins and the printed circuit board.

  As described above, according to the present invention, the bonding area of the printed circuit board can be rigidly fixed by the pair of the first connector fixing portions, so that the deformation of the printed circuit board in the bonding area can be suppressed, and the connector pin with respect to the printed circuit board can be prevented. Connection reliability can be improved.

  In addition, as described in claim 12, the connector fixing portion is arranged between the first connector fixing portion and the first connector fixing portion, the extension length from the housing being different from the first connector fixing portion. The second connector fixing portion may be configured to be included.

  As described above, according to the present invention, since the first connector fixing portion and the second connector fixing portion that are paired can be fixed on the surface, the connection reliability of the connector pin can be further improved.

  Specifically, for example, as described in claim 13, it is possible to adopt a configuration in which the extension length from the housing of the second connector fixing portion is shorter than that of the first connector fixing portion. In this case, the joining region may not be divided by the second connector fixing portion.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is an exploded view showing a state before assembly for explaining a schematic configuration of the electronic device according to the first embodiment of the present invention. The electronic device shown in the present embodiment is a non-waterproof electronic device, and is used, for example, as an engine ECU (Electric Control Unit) of a vehicle.

  As shown in FIG. 1, the electronic device 100 includes a case 20 and a cover 30 constituting the housing 10, a circuit board 40 accommodated in the housing 10, a connector 50 mounted on the circuit board 40, Is included.

  The housing 10 is made of, for example, a metal material such as aluminum or iron, or a synthetic resin material, and has a box-like case 20 that is open on one side, and a shallow cover 30 that has a substantially rectangular plate shape that closes the open surface of the case 20. It consists of. Then, by assembling the case 20 and the cover 30, the housing 10 having an internal space for accommodating the circuit board 40 is configured. In the present embodiment, the case 20 and the cover 30 are configured to be fixed by screw fastening. The housing 10 is not limited to one constituted by two members, the case 20 and the cover 30. It may be composed of one member or may be composed of three or more members.

  The circuit board 40 is formed by mounting electronic components 42 such as a microcomputer, a power transistor, a resistor, and a capacitor on a printed board 41 formed with wirings (not shown) and via holes connecting the wirings. As a constituent material of the printed circuit board 41, a known material such as a thermoplastic resin, a thermosetting resin, ceramic, a composite of glass (for example, a glass cloth) and a resin, or the like can be applied.

  A connector 50 that electrically connects the circuit board 40 and the outside is mounted on the printed circuit board 41. The connector 50 includes a plurality of connector pins 51 that are mounted on the printed circuit board 41 and exposed at the other end to the outside of the housing 10 in a housing 52 made of an insulating material. Specifically, the housing 10 (the case 20 in the present embodiment) is provided with a connector notch (not shown) corresponding to the connector 50, and the case 20 and the case 20 so as to accommodate the circuit board 40. With the cover 30 screwed, a part of the connector 50 (including the region where the connector pin 51 is joined to the printed circuit board 41) is accommodated in the housing 10, and the remaining part (the non-joined side of the connector pin 51 is connected). Are exposed outside the housing 10. Reference numeral 53 shown in FIG. 1 is a connector fixing portion 53 provided in the housing 52 for fixing the connector 50 to the printed circuit board 41 by a fixing means.

  In the electronic device 100 configured as described above, the circuit board 40 is positioned and fixed by the board fixing means provided in the casing 10 in order to prevent the positional deviation (movement) of the circuit board 40 in the casing 10. There is a need. As a fixing structure, for example, there is a structure in which the case 20, the circuit board 40, and the cover 30 are fixed by screws in a state where the printed circuit board 41 is sandwiched between the case 20 and the cover 30. Further, the circuit board 40 is fixed by sandwiching the printed circuit board 41 between the fixing portions provided in the case 20 and the cover 30. That is, since the housing 10 is disposed in contact with a part of the printed circuit board 41, the fixing portion of the printed circuit board 41 with respect to the housing 10 is the first mounting in which the electronic component 42 cannot be mounted as shown in FIG. It becomes a prohibited area 43.

  Further, as described above, the connector 50 is mounted on the printed circuit board 41 by the connector fixing portion 53. The connector fixing portion 53 is generally formed in a flange shape extending from the housing 52 along the surface of the printed circuit board 41, and is fixed to the printed circuit board 41 by, for example, screw fastening. That is, in the printed circuit board 41, the fixing portion of the connector fixing portion 53 is a second mounting prohibited area 44 in which the electronic component 42 cannot be mounted, as shown in FIG. In FIG. 2A, as an example, there are four fixing portions (first mounting prohibited areas 43) of the circuit board 40 with respect to the housing 10 and fixing portions (second portions) of the connector fixing portions 53 with respect to the circuit board 40. Are forbidden areas 44). That is, a total of six prohibited mounting areas 43 and 44 are required for fixing the circuit board 40 and the connector 50.

  It is also conceivable to reduce the second mounting prohibited area 44 in the printed circuit board 41 by forming the connector fixing portion 53 in the lower portion of the housing 52. However, when the connector fixing portion 53 is formed in the lower portion of the housing 52, the height of the connector 50 from the substrate surface is increased by the thickness of the connector fixing portion 53. Therefore, it is difficult to reduce the size of the electronic device 100 in the height direction.

  Therefore, in this embodiment, in fixing the circuit board 40 and fixing the connector 50, as shown in FIG. 2B, a part of the fixing part of the circuit board 40 is part of the connector 50 in the plane direction of the printed board 41. It was made to overlap with a fixed part. Thereby, the electronic device 100 can be miniaturized in the height direction and the plane direction while reducing the ratio of the mounting prohibition regions 43 and 44 required for the printed circuit board 41 as compared with the related art. 2A and 2B are plan views showing the first and second mounting prohibited areas 43 and 44 in the printed circuit board 41, where FIG. 2A is a conventional configuration, and FIG. 2B is a diagram showing a configuration according to the present embodiment. is there.

  Specifically, as shown in FIGS. 2B and 3, the connector fixing portion 53 extends from the side surface of the housing 52 along the surface of the printed circuit board 41 and is fixed to the connector while being in contact with the printed circuit board 41. The screw 60 as means is fixed to the printed circuit board 41. As described above, when the screws 60 are fixed, the connector fixing portion 53 can be firmly fixed to the printed circuit board 41 as compared with the configuration in which the screws 60 are fixed by a so-called snap fit. That is, since the printed circuit board 41 is reinforced by the connector fixing portion 53 and fixed to the rigid, the distortion generated in the printed circuit board 41 based on the difference between the linear expansion coefficients of the printed circuit board 41 and the housing 52 is reduced (the deformation of the printed circuit board 41 is reduced). Suppression). Further, when the connector fixing portion 53 is disposed in the vicinity of the joint portion between the connector pin 51 and the printed circuit board 41, the connection reliability of the connector pin 51 can be improved.

  The connector fixing portion 53 according to the present embodiment is integrally formed with the housing 52, and the two connector fixing portions 53 extend from different portions of the housing 52. That is, the connector 50 is configured to be fixed to the printed circuit board 41 at two locations. FIG. 3 is an enlarged cross-sectional view showing a fixing part of the circuit board 40 and a fixing part of the connector 50. In FIG. 3, reference numeral 54 denotes a screw fastening groove formed in the connector fixing portion 53, and reference numeral 45 denotes a screw fastening through-hole formed in the printed circuit board 41. That is, the connector fixing means includes the screw 60, the groove portion 54, and the through hole 45.

  The connector fixing portion 53 is set so that its thickness is equal to or greater than the rigidity of the printed circuit board 41 at the fixing portion. That is, the printed circuit board 41 is configured to be reinforced more effectively.

  The case 20 is provided with a case side fixing portion 21 as a board fixing means that protrudes toward the inner surface side corresponding to the connector fixing portion 53 so as to contact the upper surface of the connector fixing portion 53 (the surface facing the case 20). It has been. The case-side fixing portion 21 according to the present embodiment includes a convex shaft portion 21a that is integrally formed with the case 20, and a cylindrical tip portion 21b that is made of rubber and into which the shaft portion 21a is inserted. As described above, when rubber is used as the constituent material of the contact portion, the circuit board 40 is fixed and the load applied to the connector fixing portion 53 is fixed while fixing the circuit board 40 by the appropriate flexibility of the rubber. The stress acting on the printed circuit board 41 can be reduced by the housing 52, the female connector, the harness, etc.), the cooling load, and the like. The tip 21b made of rubber is preferably designed so as to ensure a load capable of fixing the connector 50 at the minimum load and prevent the rubber from being damaged at the maximum load in consideration of component accuracy. For this purpose, the compression size of the rubber is 5 to 40%, preferably about 20%, and the hardness is 30 to 80 °, preferably 45 to 65 °. In the present embodiment, the length of the rubber constituting the tip portion 21 is 9 mm, the rubber compression dimension is 20%, and the rubber hardness is 55 °.

  The cover 30 is provided with a cover side fixing portion 31 as a substrate fixing means that protrudes to the inner surface side corresponding to the connector fixing portion 53 so as to contact the back surface of the connector fixing portion arrangement portion of the printed circuit board 41. Yes. The cover side fixing portion 31 according to the present embodiment is integrally formed with the cover 30, and two covers are provided on the cover 30.

  The connector fixing portion 53 and the printed circuit board 41 are sandwiched (fixed) by the case side fixing portion 21 and the cover side fixing portion 31 in a state where the connector fixing portion 53 is fixed to the printed circuit board 41 by the screw 60.

  In the present embodiment, as shown in FIGS. 3 and 4, in the fixed state, the case side fixing portion 21 (tip portion 21 b) is disposed at the center of gravity of the two cover side fixing portions 31. A case side fixing portion 21 and a cover side fixing portion 31 are configured. Therefore, the printed circuit board 41 can be clamped more stably, and distortion generated in the printed circuit board 41 can be efficiently reduced. Further, the screw 60 which is the connector fixing means is arranged at the center of gravity of the two cover side fixing portions 31, that is, the case side fixing portion 21 and the screw 60 coincide with each other in the plane direction of the printed circuit board 41. Has been. Therefore, distortion generated in the printed circuit board 41 can be more efficiently reduced. FIG. 4 is a plan view showing a positional relationship among the connector fixing portion 53, the case side fixing portion 21, the cover side fixing portion 31, and the screw 60 as the connector fixing means in the planar direction.

  In the present embodiment, the housing 10 and the housing 52 of the connector 50 are set so as not to contact each other even when there is a maximum deviation due to tolerance when external stress (vibration, cooling load, etc.) is applied. That is, the contact 52 causes a stress in the housing 52 to suppress a decrease in the connection reliability of the connector pin 51. Further, the gap between the housing 52 and the housing 10 is set to a minimum value in a range where no contact is made. In other words, the housing 10 receives a part of the bending stress generated when fitting with the female connector, thereby suppressing a decrease in connection reliability of the connector pin 51. Further, even if the connector fixing portion 53 and the case side fixing portion 21 have the maximum deviation in tolerance, the case side fixing portion 21 is set to contact the upper surface of the connector fixing portion 53. Therefore, the circuit board 40 can be fixed to the housing 10.

  As described above, according to the electronic device 100 according to the present embodiment, the case side fixing portion 21 and the cover side fixing portion 31 as the board fixing means are provided on the back surface of the connector fixing portion 53 and the connector fixing portion arrangement portion of the printed circuit board 41. The printed circuit board 40 is fixed to the housing 10 in the contact state. Therefore, in fixing the circuit board 40 and the connector 50, the ratio of the mounting prohibited areas 43 and 44 in the printed circuit board 41 can be reduced. That is, the board mounting density can be improved. In the present embodiment, as shown in FIG. 2 (b), only four mounting prohibited areas 43 and 44 are required, which is different from the conventional configuration shown in FIG. 2 (a). The first mounting prohibited area 43 for two places can be used as a mounting area.

  Further, in the present embodiment, as described above, the ratio of the mounting prohibited areas 43 and 44 can be reduced, so that the size of the circuit board 40 in the planar direction, that is, the size of the electronic device 100 can be reduced. Can do. In addition, since the connector fixing portion 53 extends from the housing 52 along the surface of the printed circuit board 41, the height of the connector 50, that is, the height of the electronic device 100 can be reduced. Therefore, the physique of the apparatus 100 can be reduced in size in both the planar direction and the height direction.

  In the present embodiment, the connector fixing portion 53 is held together with the printed circuit board 41 by the case side fixing portion 21 and the cover side fixing portion 31 which are substrate fixing means. That is, the fixing portion of the printed circuit board 41 with respect to the housing 10 is reinforced by the connector fixing portion 53 to be rigid. Therefore, the distortion generated in the printed circuit board 41 due to the bending when mating with the female connector, the load (housing, female connector, harness, etc.) applied to the connector fixing portion 53, the cooling load, etc. is reduced (the deformation of the printed circuit board 41 is suppressed). )can do.

  In the present embodiment, an example in which two cover side fixing portions 31 are provided on the cover 30 is shown. However, the number of cover-side fixing portions 31 is not limited to two. One may be sufficient and three or more may be sufficient. For example, as shown in FIG. 5A, the front end of one cover side fixing portion 31 may be branched into two so as to contact the printed circuit board 41 at two locations. In this case, if the case-side fixing portion 21 is arranged at the center of gravity of the branched tip portion, the distortion generated in the printed circuit board 41 can be efficiently reduced. Moreover, as shown in FIG.5 (b), it is good also as a structure by which the three cover side fixing | fixed parts 31 are provided and the case side fixing | fixed part 21 is arrange | positioned in the gravity center position.

  Moreover, in this embodiment, the example in which the screw 60 as the connector fixing means is arranged at the center of gravity of the cover side fixing portion 31 has been shown. However, as shown in FIG. 5 (b), a position different from the center of gravity of the cover side fixing portion 31 may be fixed by the screw 60. 5A and 5B are diagrams showing a modification of the cover side fixing portion 31, wherein FIG. 5A is a cross-sectional view of the cover side fixing portion 30, and FIG. 5B is a connector fixing portion 53 and the case side fixing portion 21 in the planar direction. It is a top view which shows the positional relationship of the screw | thread 60 as a cover side fixing | fixed part 31 and a connector fixing means.

  Further, in the present embodiment, an example in which the substrate fixing means provided in the housing 10 is configured by one case side fixing portion 21 and two cover side fixing portions 31 is shown. However, the case-side fixing portion 21 and the cover-side fixing portion 31 may have a configuration opposite to the configuration shown in the present embodiment. At least the board fixing means fixes the printed board 41 from at least one of the upper side and the lower side, and at least a part of the board fixing means is at least on the back surface of the connector fixing part 53 and the connector fixing part arrangement portion of the printed board 41. Any configuration may be used as long as the printed circuit board 41 is fixed in contact with one side. Therefore, the configuration is not limited to the configuration in which the printed circuit board 41 and the connector fixing portion 53 are sandwiched. For example, the circuit board 40 may be fixed by screws or rivets penetrating (that is, provided) through the housing 10.

(Second Embodiment)
Next, a second embodiment of the present invention will be described based on FIG. FIG. 6 is a plan view showing the periphery of the mounting portion of the connector 50 in the electronic device 100 according to the second embodiment. In FIG. 6, the connector pin 51 and the electronic component 42 are omitted.

  Since the electronic device 100 according to the second embodiment is often in common with that according to the first embodiment, a detailed description of the common parts will be omitted below, and different parts will be mainly described.

  As shown in FIG. 6, the electronic device 100 according to the second embodiment has a first portion that extends from the side surface of the housing 52 toward the joining region 46 between the connector pin 51 (not shown) and the printed circuit board 41 as shown in FIG. 6. One connector fixing portion 55 is provided, and a joining region 46 is disposed between the connector fixing portions 55. That is, the arrangement position of the connector fixing portion 53 (first connector fixing portion 55) is clearly defined with respect to the first embodiment. In the present embodiment, the first connector fixing portion 55 is integrally formed with the housing 52.

  As described above, according to the electronic device 100 according to the present embodiment, the bonding region 46 of the printed circuit board 41 is fixed to the rigid by the first connector fixing portion 55 arranged so as to sandwich the bonding region 46 therebetween. Can do. Therefore, the connection reliability of the connector pin 51 can be improved.

  If at least a part of the joining region 46 is disposed between the first connector fixing portions 55, the connection reliability of the connector pins 51 can be improved to some extent. As the length of the printed circuit board 41 is longer, the printed circuit board 41 at the arrangement site is reinforced, so that the joining region 46 can be more rigidly fixed and the connection reliability can be improved. However, when the length of the connector fixing portion 53 is increased, the ratio of the second mounting prohibited area 44 is increased. Therefore, in the present embodiment, the first connector fixing portion 55 is configured so that the extending tip of the first connector fixing portion 55 and the end portion of the joining region 46 on the side opposite to the housing substantially coincide with each other. If comprised in this way, connection reliability can be improved, making the 2nd mounting prohibition area | region 44 small as much as possible.

  In the present embodiment, an example in which the first connector fixing portion 55 is integrally formed with the housing 52 is shown. However, the first connector fixing portion 55 may be configured as a separate member from the housing 52 and integrated with the housing 52 by fixing (screw fastening or the like).

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 7 is a plan view showing the periphery of the mounting portion of the connector 50 in the electronic device 100 according to the third embodiment. In FIG. 7, the connector pin 51 and the electronic component 42 are omitted.

  Since the electronic device 100 according to the third embodiment is often in common with that according to the second embodiment, a detailed description of the common parts will be omitted, and different parts will be mainly described below.

  As shown in FIG. 7, the electronic device 100 according to the third embodiment has a connector fixing portion 53 between the first connector fixing portion 55 shown in the second embodiment and the first connector fixing portion 55. The second connector fixing portion 56 is disposed, and the extension length of the second connector fixing portion 56 from the housing 52 is set to be different from that of the first connector fixing portion 55. And

  Specifically, as shown in FIG. 7, the second connector fixing portion 56 is integrally formed with the housing 52 like the first connector fixing portion 55, and in the longitudinal direction of the housing 52, 1 is provided at an intermediate position of the connector fixing portion 55. Further, the extension length from the housing 52 is shorter than that of the first connector fixing portion 55, and the extension tip thereof is configured not to interfere with the joining region 46 (that is, to contact the connector pin 51). The contact part of the case-side fixing part 21 that contacts the first connector fixing part 55 and the contact part of the case-side fixing part 21 that contacts the second connector fixing part 56 are not arranged in a straight line but in a plane arrangement (triangles). Arranged to make

  As described above, according to the electronic device 100 according to the present embodiment, the printed circuit board 41 in the joining region 46 is more rigidly fixed by the surface fixing by the first connector fixing portion 55 and the second connector fixing portion 56. Further, it is possible to further reduce distortion generated in the bonding region 46 (printed circuit board 41). That is, the connection reliability of the connector pin 51 can be further improved as compared with the configuration shown in the second embodiment.

  In the present embodiment, the example in which the second connector fixing portion 56 is shorter than the first connector fixing portion 55 is shown, but the same effect can be obtained even if the configuration is longer than the first connector fixing portion 55. You can expect. However, if the length is increased, the joining region 46 must be divided. Therefore, if the number of pins is the same, the area of the joining region 46 may be increased. Therefore, it is preferable to employ the configuration shown in this embodiment.

  Moreover, in this embodiment, the example in which the 1st 2nd connector fixing | fixed part 56 is arrange | positioned between the 1st connector fixing | fixed parts 55 was shown. However, a configuration may be adopted in which a plurality of second connector fixing portions 56 are arranged.

  In the present embodiment, an example in which the second connector fixing portion 56 is integrally formed with the housing 52 is shown. However, the second connector fixing portion 56 may be configured as a separate member from the housing 52 and integrated with the housing 52 by fixing (screw fastening or the like).

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIG. 8A and 8B are enlarged views showing a fixing part of the circuit board 40 and a fixing part of the connector 50 in the electronic device 100 according to the fourth embodiment, where FIG. 8A is a cross-sectional view and FIG. 8B is a plan view. In FIG. 8B, the connector pin 51 and the electronic component 42 are omitted.

  Since the electronic device 100 according to the fourth embodiment is often in common with that according to the first to third embodiments, the detailed description of the common parts will be omitted below, and different parts will be mainly described.

  In the electronic device 100 according to the fourth embodiment, the connector fixing portion 53 is located on the opposite surface of the contact surface (that is, the upper surface on which the case side fixing portion 21 contacts) rather than the contact surface (lower surface) with the printed circuit board 41. It is characterized by a configuration with a large area. Specifically, as shown in FIGS. 8A and 8B, the first connector fixing portion 55 includes a flange portion 55a connected to the upper surface with which the case side fixing portion 21 contacts. In the present embodiment, the flange portion 55 a is integrally formed with the first connector fixing portion 55.

  As described above, according to the electronic device 100 according to the present embodiment, the case-side fixing portion 21 is stabilized while reducing the ratio of the second mounting prohibited area 44 occupied by the connector fixing portion 53 (55) in the printed circuit board 41. The contact area can be ensured so as to make contact.

In the present embodiment, for the first connector fixing portion 55 extending from the housing 52 toward the joining region 46, the flange portion 55 a is provided on the connector pin 51 arrangement side and the connector fixing portion 53 extension side. If comprised in this way, in addition to the above-mentioned effect, the guide area | region for positioning and conveying a board | substrate can be taken widely in a manufacturing process (for example, reflow process).
For example, when the flange portion 55a is provided on the opposite side of the connector pin 51 from the arrangement side, the guide region becomes narrow in the manufacturing process, and the circuit board 40 cannot be stably conveyed. That is, when the connector pin 51 is disposed outside the joining region 46 in the longitudinal direction of the housing 52 (for example, disposed on the side surface in the longitudinal direction of the housing 52 and flush with the side surface in the longitudinal direction). It is good to set it as the structure which does not provide the collar part 55a on the opposite side.

  Moreover, in this embodiment, the example in which the collar part 55a was integrally formed with the 1st connector fixing | fixed part 55 was shown. However, it may be configured as a separate member and integrated by fixing.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a perspective view showing positioning means provided in the housing 10 in the electronic device 100 according to the fifth embodiment, and shows the case 20 and the cover 30 being assembled.

  Since the electronic device 100 according to the fifth embodiment is often in common with that according to the first to fourth embodiments, detailed description of the common parts will be omitted, and different parts will be described mainly.

  In the electronic device 100 according to the fifth embodiment, positioning means for determining a position when the housing 10 is configured is provided in the case 20 and the cover 30, and the case side fixing portion 21 contacts the connector pin 51 when the positioning means is assembled. It is characterized in that it is configured not to do so. Specifically, as shown in FIG. 9, as a positioning means, a positioning projection 22 is provided at a portion where the case 20 is fixed to the cover 30, and the positioning projection 22 is provided at a portion where the cover 30 is fixed to the case 20. A positioning hole 32 to be inserted is provided, and in the thickness direction of the printed board 41, the projection length of the positioning projection 22 is longer than the maximum height of the connector pin 51 from the surface of the printed board 41. That is, the case-side fixing portion 21 is configured not to contact the connector pin 51 in a state where the tip of the positioning projection 22 is in contact with the fixing portion (fixing surface) of the cover 30 during assembly.

  As described above, according to the electronic device 100 according to the present embodiment, the case 20 and the cover 30 can be assembled so that the case-side fixing portion 21 does not contact the connector pin 51. That is, it is possible to prevent the connection failure caused by the contact described above from occurring at the joint between the printed circuit board 41 and the connector pin 51.

  In addition, if a plurality of pairs of the positioning protrusions 22 and the positioning hole portions 32 are provided, positioning becomes easier. In the present embodiment, the connector 50 is provided in two places with the connector 50 interposed therebetween.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In the present embodiment, an example in which the connector fixing portion 53 (the first connector fixing portion 55 and the second connector fixing portion 56) is configured to extend from the surface of the housing 52 with respect to the joining region 46 is shown. However, the connector fixing portion 53 is not limited to the above configuration as long as it is configured to extend from the housing 52 along the surface of the printed circuit board 41. For example, as shown in FIG. 10, it is possible to employ a configuration in which connector fixing portions 53 are provided on the side surfaces of the housing 42 (both side surfaces in FIG. 10). FIG. 10 is a plan view showing a modification.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded view illustrating a schematic configuration of an electronic device according to a first embodiment of the present invention, showing a state before assembly. It is a top view which shows the 1st and 2nd mounting prohibition area | region in a printed circuit board, (a) is a conventional structure, (b) is a figure which shows the structure which concerns on this embodiment. It is an expanded sectional view which shows the fixing | fixed part of a circuit board and the fixing | fixed part of a connector. It is a top view which shows the positional relationship of the screw as a connector fixing | fixed part in a plane direction, a case side fixing | fixed part, a cover side fixing | fixed part, and a connector fixing means. It is a figure which shows the modification of a cover side fixing | fixed part, (a) is sectional drawing of a cover side fixing | fixed part, (b) is the connector fixing | fixed part in a plane direction, a case side fixing | fixed part, a cover side fixing | fixed part, and connector fixing It is a top view which shows the positional relationship of the screw as a means. In the electronic device which concerns on 2nd Embodiment, it is a top view which shows the circumference | surroundings of the mounting site | part of a connector. In the electronic device which concerns on 3rd Embodiment, it is a top view which shows the circumference | surroundings of the mounting site | part of a connector. In the electronic device which concerns on 4th Embodiment, it is an enlarged view which shows the fixing | fixed part of a circuit board and the fixing | fixed part of a connector, (a) is sectional drawing, (b) is a top view. In the electronic device which concerns on 5th Embodiment, it is a perspective view which shows the positioning means provided in the housing | casing, and has shown the time of the assembly | attachment of a case and a cover. It is a top view which shows a modification.

Explanation of symbols

10 ... Case 20 ... Case 21 ... Case side fixing part (substrate fixing means)
30 ... Cover 31 ... Cover side fixing part (Board fixing means)
40 ... Circuit board 41 ... Printed circuit board 43 ... First mounting prohibited area 44 ... Second mounting prohibited area 50 ... Connector 51 ... Connector pin 52 ... Housing 53 ..Connector fixing portion 55 ... first connector fixing portion 56 ... second connector fixing portion 100 ... electronic device

Claims (13)

A housing,
A circuit board that is mounted with electronic components on a printed circuit board and is housed in the housing;
A connector in which one end is mounted on the circuit board and the other end is exposed to the outside of the housing as a connector pin as a plurality of connector pins, and the housing is disposed on the housing,
The connector has a connector fixing portion that extends from the housing along the surface of the printed circuit board and is fixed to the printed circuit board by connector fixing means in contact with the printed circuit board.
The housing has a substrate fixing means for fixing the printed circuit board from at least one of the upper side and the lower side,
The printed circuit board is fixed in a state in which at least a part of the substrate fixing means is in contact with at least one of the connector fixing portion and the back surface of the printed circuit board where the connector fixing portion is disposed. Electronic device to play. The housing is composed of a box-shaped case that is open on one side and a cover that covers the case,
The board fixing means includes a case side fixing portion provided in the case and a cover side fixing portion provided in the cover, and the connector fixing portion and the print are formed by the case side fixing portion and the cover side fixing portion. The electronic device according to claim 1, wherein a back surface of a portion of the board where the connector fixing portion is disposed is sandwiched. One of the case-side fixing part and the cover-side fixing part has one tip part that contacts the connector fixing part or the printed circuit board, and the other has a tip part that contacts the connector fixing part or the printed circuit board. A plurality of
The electronic device according to claim 2, wherein in the planar direction of the circuit board, the one tip portion is disposed at a center of gravity of the other tip portion.   The electronic apparatus according to claim 3, wherein the connector fixing means is disposed at the position of the center of gravity.   5. The method according to claim 2, wherein at least one of the case-side fixing portion and the cover-side fixing portion is made of rubber within a predetermined range from a contact tip with the connector fixing portion or the printed circuit board. The electronic device described. As positioning means for determining the position when configuring the housing, one of the case and the cover has a positioning projection, and the other has a positioning hole into which the positioning projection is inserted,
6. The electronic device according to claim 2, wherein in the thickness direction of the printed circuit board, the positioning protrusion is longer than a maximum height of the connector pin from the surface of the printed circuit board.   The electronic device according to claim 1, wherein a thickness of the connector fixing portion is a thickness that is equal to or greater than a rigidity of the printed circuit board at a fixing portion.   8. The electronic device according to claim 1, wherein the connector fixing portion is configured to have a larger area on an opposite surface of the contact surface than on a contact surface with the printed circuit board. .   The electronic device according to claim 8, wherein the facing surface includes a collar portion.   The electronic device according to claim 9, wherein the flange portion is provided on a side where the connector pin is disposed.   11. The electronic device according to claim 1, wherein the connector fixing portion includes a pair of first connector fixing portions that arrange a joint region between the connector pin and the printed circuit board therebetween. .   The connector fixing portion includes a second connector fixing portion disposed between the first connector fixing portions, the extension length from the housing being different from the first connector fixing portion. The electronic device according to claim 11.   The electronic device according to claim 12, wherein the second connector fixing portion has an extension length from the housing shorter than that of the first connector fixing portion.

Images